docs: def is_regular(self, rtol: float = 1.e-5, atol: float = 1.e-8) -> bool:
          """Whether all bins have the same width.
  
          Parameters
          ----------
          rtol, atol : numpy tolerance parameters
          """
          return np.allclose(np.diff(self.bins[1] - self.bins[0]), 0.0, rtol=rtol, atol=atol)